Question

Combination reaction is said to be opposite of decomposition reaction .Why?

Answer 1

Answer:

in combination reaction two elements or compounds combine to form a new substance

C+O2=CO2

in decomposition reaction an compound breaks down into two or more elements of compounds

CaCO3 +heat->CaO +CO2

combine is opposite of decompose

Answer 2

Explanation:

1. combination reaction:-) in this type of reaction two or more substance combine to form a new compound .

ex. H2+O2 -> 2H2O.

2. Decombination reaction:-) in this type of reaction one compound breakdown into two or more substance or compound.

ex.2H2O -> H2+O2.